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[Macroamylasemia in the differential diagnosis of acute pancreatitis]
J Domènech Calvet1, J J Sánchez Cano, A Sánchez Marín
1Servicio de Cirugía, Hospital Universitario de Sant Joan, Reus.
Abstract:
The presence of macroamylasemia should be considered in the differential diagnosis of hyperamylasemia associated with acute abdominal pain, with suspect of pancreatitis. This uncommon and poorly known abnormality is defined as a blinding of serum amylase to certain proteins forming a circulating macrocomplex which prevents renal clearance of serum amylase. Two clinical cases as well as a review of this rare entity are here reported.
Insights
Macroamylasemia, an uncommon cause of high serum amylase, should be considered in patients with abdominal pain and suspected pancreatitis. This condition involves amylase binding to proteins, forming a complex that hinders kidney clearance.
Area of Science:
- Clinical Biochemistry
- Internal Medicine
- Diagnostic Medicine
Background:
- Hyperamylasemia is often investigated in patients presenting with acute abdominal pain, frequently leading to suspicion of pancreatitis.
- Macroamylasemia is an uncommon and infrequently recognized cause of elevated serum amylase levels.
Observation:
- This report details two clinical cases illustrating macroamylasemia.
- The condition is characterized by the formation of a circulating macrocomplex involving serum amylase and other proteins.
Findings:
- This macrocomplex formation impairs the normal renal clearance of serum amylase, leading to persistently elevated levels.
- The presence of macroamylasemia can mimic or complicate the diagnosis of acute pancreatitis.
Implications:
- Clinicians should include macroamylasemia in the differential diagnosis for unexplained hyperamylasemia, particularly in the context of abdominal pain.
- Recognizing macroamylasemia is crucial to avoid misdiagnosis and unnecessary interventions for pancreatitis.